oh wait, and what about the south china karst world heritage? maybe we should include it on the list, along with ha long bay. this was suggested in the minutes since they are located in roughly the same region, what is interesting here is the south china karst is mostly located inland (any water-related view would be from a river), while the ha long bay has a marine setting.
also, i think the committee also recommended that two of the three chinese natural sites inscribed in 1992 could be renominated as one unit. as i recall, there's a mountain/forest gap between the two (minshan, i think) and they deemed that it has world heritage potential. so they are located somewhat contiguous and in the same region too.
lastly, do we also consider "twinning" agreements as proposed by the committee? like in the case of the portuguese laurisilva and spanish garajonay np, since both represent remnant laurel forests in atlantic islands? i'm not really familiar with the specifics of twinning agreements, if it just means greater cooperation in terms of management plan and scientific research, or it really refers to nominating the multiple sites as one entry on the list. i remember that there was also a twinning suggestion between yosemite and one of the chinese sites. and when i googled "twinning world heritage sites", i found this out: http://www.sinoptic.ch/shanghaiflash/texts/pdf/200206_Shanghai.Flash.pdf
so based on this, twinning might just refer to greater cooperation in terms of management and site protection.